Webster-Ashburton Treaty

The Webster-Ashburton Treaty was a treaty signed between the United States and United Kingdom on 9 August 1842, resolving the border dispute between the two nations on the Maine-Canada border. The treaty led to the cession of Caribou to the United States, defining the border as  the land between Lake Superior and the Lake of the Woods. In addition, it ended the slave trade on the high seas, and it also allowed for the US Navy and Royal Navy to share control of the Great Lakes.